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Dynamic fracture toughness

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Abstract

Dynamic fracture toughness versus crack velocity relations of Homalite-100, polycarbonate, hardened 4340 steel and reaction bonded silicon nitride are reviewed and discrepancies with published data and their probable causes are discussed. Data scatter in published data are attributed in part to the observed fluctuations in crack velocities. The results reaffirmed our previous conclusion that the dynamic fracture toughness versus crack velocity relation is specimen dependent and that the dynamic crack arrest stress intensity factor is not a unique material property.

Résumé

On passe en revue les relations entre la ténacité à la rupture dynamique et la vitesse de propagation d'une fissure, dans le cas de l'Homalite-100, du polycarbonate, de l'acier 4340 durci, et de nitrure de silicium assemblé par liaisons chimiques. On relève les divergences par rapport aux données publiées, et leurs causes probables. On attribue la dispersion des données en partie aux fluctuations observées dans les vitesses de la fissure.

Les résultats confirment les conclusions précédemment exprimées, selon lesquelles d'une part la relation qui lie la ténacité à la rupture dynamique à la vitesse de la fissure dépend de l'éprouvette, et d'autre part le facteur dynamique d'intensité de contraintes correspondant à l'arrêt d'une rupture n'est pas une propriété univoque du matériau.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Washington, 98195, Seattle, WA, USA

    A. S. Kobayashi, M. Ramulu, M. S. Dadkhah, K. -H. Yang & B. S. J. Kang

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  1. A. S. Kobayashi
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  2. M. Ramulu
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  3. M. S. Dadkhah
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  4. K. -H. Yang
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  5. B. S. J. Kang
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Kobayashi, A.S., Ramulu, M., Dadkhah, M.S. et al. Dynamic fracture toughness. Int J Fract 30, 275–285 (1986). https://doi.org/10.1007/BF00019707

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  • DOI: https://doi.org/10.1007/BF00019707

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